Abstract
Intercomparison lead isotope abundances of galenas from the Kootenay district, British Columbia, are used to illustrate the application of multistage lead lines to determination of volume of source rocks of the radiogenic lead component. Calculations indicate that relatively small volumes of crustal rocks (less than 10 cubic kilometers) could supply the radiogenic component of some multi-stage lead deposits if only one-third of the radiogenic lead were extracted. Volumes determined from multi-stage lead data agree well with a more common method of volume estimation.
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